爆炸逻辑零门可靠性研究

建立了爆炸逻辑零门作用可靠性的数学模型，讨论作用可靠性概率窗口，对拐角效应零门和接触零门进行了具体分析。文给出了相应的可靠性试验数据为逻辑网络的研究提供了依据。     

一种新型爆炸逻辑零门设计研究

运用爆炸网络设计原理设计出一种新型的爆炸逻辑零门,通过试验基本确定这种以黑索金为基的网络炸药的零门设计参数,即夹角α为35°～55°.爆炸逻辑零门的实现进一步证实了实现爆炸逻辑网络的可行性.     

一种爆炸逻辑元件的设计

根据爆炸逻辑元件的作用原理,对爆炸零门及控制开关进行了设计,试验研究了不同结构、不同传爆药以及不同控制通道与传爆通道间隙下的零门功能,以及控制开关作用时间.结果表明:选择感度适中的细化HMX和较高爆炸能量的控制通道,在一定间隙下,爆炸逻辑元件能够完成自锁逻辑传爆功能;此外,应选择作用时间较短韵控制开关,并注意其与起爆雷管的作用时间的匹配.     

冲击片雷管双裕度系数设计方法研究

为了提高冲击片雷管的设计可靠度,依据冲击片雷管的作用原理,以某型冲击片雷管为例分别计算了以输入刺激量、飞片速度等为特征参量的冲击片雷管裕度系数。结果表明,仅以输入刺激量表征产品设计裕度不能完全反映产品的可靠性状态,而辅助以飞片速度为特征参量的输出裕度系数则能更真实地体现产品的质量特性。提出了一种在雷管设计过程中同时考虑,以输入刺激量为特征参量的输入裕度系数和以飞片速度为特征参量的输出裕度系数的双裕度系数设计方法,来提高冲击片雷管裕度系数设计的科学性。     

爆炸逻辑元件的研究

论述了爆炸逻辑元件──爆炸逻辑零门和与门的设计原理和设计方案；通过实验，实现了上述两种爆炸逻辑元件的设计，研制成了基板式爆炸逻辑零门和爆炸逻辑与门。     

冲击片雷管四点阵列输出界面作用可靠性设计方法

针对冲击片雷管缺乏可靠性量化设计方法的问题，开展了冲击片雷管四点阵列输出界面可靠性设计方法研究。首先基于应力-强度干涉模型提出考虑双裕度系数的可靠性量化设计方法，构建输出性能参数与可靠度指标之间的量化模型；然后对不同设计参数下的输出性能进行仿真，建立输出性能参数与结构设计参数之间的量化模型；最后结合上述两类量化模型，给出了满足冲击片雷管四点阵列输出界面作用可靠度指标要求的结构设计参数。结果表明，该方法可以有效提高冲击片雷管输出界面的可靠性设计精度，实现精确设计。     

改进间隙式爆炸零门的设计及可靠性研究

对间隙式爆炸零门进行了改进设计,并对其可靠性进行了研究,得到了可靠性窗口,发现爆炸逻辑零门的可靠性窗口与零门的关闭时间有较大的关系, 零门的关闭时间间隔越长,可靠性窗口越宽.同时还发现,在拐角距离较长,爆轰波拐弯后处于非稳定的弱爆轰条件下,零门的可靠性窗口将发生偏移.     

马尔可夫理论在爆炸逻辑网络安全性与可靠性分析中的应用

将马尔可夫过程应用于引信安全系统爆炸逻辑网络的过程识别，通过状态转移过程分析和转移概率计算，得出爆炸逻辑网络的安全性与可靠性的计算方法。     

基于动态贝叶斯网络的某控制单元可靠性分析

针对传统可靠性分析方法难以描述系统动态变化特性的问题,提出了一种考虑维修因素的基于动态贝叶斯网络的可靠性分析方法。在构建某控制单元电源失效动态故障树的基础上,根据动态贝叶斯网络推理规则和故障树逻辑门向动态贝叶斯网络转化原理,建立控制单元可靠性分析模型。通过引入失效率和维修率参数,确定了控制单元可靠度随时间的变化规律,通过对比可以看出,未考虑维修因素时,单元可靠度急剧下降;考虑后,单元可靠度维持在一个理想水平。     

一种基于间隙爆炸零门的爆炸逻辑元件研究

爆炸零门是爆炸逻辑网络中的最基本和关键的爆炸逻辑元件,也是组成复杂爆炸逻辑元件的基本组成部分.文中利用间隙爆炸零门设计一种对输入爆轰信号无任何时序要求的爆炸逻辑元件--非时序爆炸异步与门,该逻辑元件能够有效的解决传统非时序爆炸异步与门通道交叉问题.验证试验结果表明,设计的爆炸异步与门结构是可行的.     

Nitrosation and Nitration of Tetraacetyldibenzylhexaazaisowurtzitane

Tetraacetyldibenzylhitane (TADBIW) was subjected to debenzylation by nitrosating with inorganic materials available commercially to synthesize tetraacetyldinitrosohexaazaisowurtzitane (TADNSIW). TADNSIW was purified, and its structure was determined by FTIR, 1H NMR, MS and element analysis. The debenzylation reaction of TADBIW gave quantitative benzaldehyde as a by-product. This indicates that the reaction produces an imine cation as an intermediate. Hexanitrohexaazaisowurtzitane (HNIW) was prepared from unpurified TADNSIW with the yield over 96.0 % and the purity more than 98.0 %. And the mechanism of the reaction from TADNSIW to HNIW is proposed to be oxidation of nitroso and nitration of acetyl on the molecule of TADNSIW, This reaction system involved is simple, and the reaction can complete within a short time and under mild conditions. The product can be easily to separate and the waste disposed readily.     

A Robust Algorithm for Watermarking 2D Vector Maps with Low Shape-Distortions

The technique of watermarking has been introduced into 2D vector maps for many potential applications such as protecting the copyright of important GIS （geographical information system） data and tracing the data source of military maps. In most previous works, although the validity of the map data could be preserved during the embedding procedure, the shape-distortions of the map elements are usually neglected which would tend to degrade the invisibility of the watermarking schemes. A shape-preserving algorithm for watermarking 2D vector maps is presented in this paper. A 1D distance sequence extracted from the original map is adopted as the cover data instead of 2D coordinates. A watermark bit is represented by changing the distributions of the cover data. The embedding procedure induces lower shape-distortions than in former works. Experimental results indicate better invisibility of the proposed scheme, as well as its robustness to certain attacks such as map simplification, interpolation, additive noise and most geometric transforms.     

Open Rule-setting System Applied to Conceptual Design of Engines

Open rule-setting method advanced in this paper concentrates on providing designers of engines with a convenient way to express their design innovations and develop the expected prototypes in the early CAD stage, and constitute effective models for the following analysis process of CAE and CAPP. The problems arisen in the process of conceptual design with the traditional experience-based development method are analyzed. Based on those analyses, open rule-setting method is presented and some associated technical problems are discussed. The functional framework of open rule-setting system was built as software engineering methods. The speciality of the engine product as a kind of complex product and the requirement of the engine product based on its structural particularity to rule-setting system are considered carefully. A demonstration is supplied to illustrate how the open rule-setting method enhances the efficiency and quality of the engine conceptual design.     

Research on Linux Network Device Driver

By analyzing the working principle of Linux network device driver, discussing the Linux network driver structure and its key technologies, the general network driver structure and its design methodologies in Linux system are summarized. Through modifying the network device driver of Linux device driver 3rd version snull, c and improving the COW technology, the Zero-Copy technology in Linux （kernel version 2.6.11 ） is implemented. In the end, the success test tells us that the thorough analysis of network device driver is the foundation of many applications, and it also provides a certain improvement to a lot of real applications, even to military application development.     

Improvement and Experiment of the Reamer in Vibra Cutter Against Wave Edge of Titanium Sheet Alloy Parts

By analyzing the influencing factors of part quality making of sheet alloy of titanium by vibra cutter, the shape of upper reamer is set as cylinder and wedge-shaped form, and the lower reamer as plain and hemicycle form, and its main structural parameters are defined as well. Then it is validated further that such improved vibra cutter reamer can be used to process curve-edged parts of titanium alloy sheet. The experimental result shows that the titanium alloy sheet parts processed by above equipment have no sharpen angles for convex parts and evident crevasse of concave-edged part. In summary, such improvement can eliminate the free-waved edge and improve the manufacture quality of titanium alloy sheet parts greatly.     

Experimental Study on the Small Flyer Initiating Behavior of Fine-grained Explosives

The initiating behavior of fine-grained explosives by small flyer is studied. The diameter of small flyer in this device is 1 ram. The test results indicate that the granularity of explosives has great effect on its flyer initiating sensitivity.The flyer initiating sensitivity of the fine-grained explosives is higher and the critical initiating energy is lower than that of common explosives. For common explosive, the flyer initiating sensitivity increases as the density is reduced. But for the fine-grained explosive, the test results are exactly opposite.     

Stability of the Third Generation Intensifier under Illumination

The stability under illumination of transmission-mode GaAs photocathode sealed in the third generation intensifier is investigated by use of spectral response testing instruments. The variations of spectral response with the illumination times under weak and intense illumination are compared. The variations of photoemission performance parameters are also characterized. The results show that during initial several weak illuminations photocathode behaves no evident decay and a maximum sensitivity is achieved, while under intense illumination the sensitivity of photocathode begin to decrease largely at the first illumination. The calculated performance parameters show that the variation of surface escape probability with illumination times is a direct cause of instability of photocathode. It is also found that under intense illumination peak wavelength is moved towards short-wave and peak response is decreased, which shows that the ability of long-wave response of photocathode is decreased.     

Algorithm for Multi-laser-target Tracking Based on Clustering Fusion

Multi-laser-target tracking is an important subject in the field of signal processing of laser warners. A clustering method is applied to the measurement of laser warner, and the space-time fusion for measurements in the same cluster is accomplished. Real-time tracking of multi-laser-target and real-time picking of multi-laser-signal are introduced using data fusion of the measurements. A prototype device of the algorithm is built up. The results of experiments show that the algorithm is very effective.     

Robust Graded Sliding Mode Tracking Control for Low Speed Spinning Ballistic Missiles

The nonlinear dynamic model of spinning ballistic missiles is established during the first boosting phase of the missile. Based on the conventional backstepping sliding mode control and the assumption of a two time-scale separation of missile dynamics, a graded sliding mode controller is designed with two sub-sliding surfaces which have invariability to external disturbances and parameter perturbations, and a matrix which comprises three first order low pass filters is introduced to prevent ＂explosion of terms＂. Owing to the upper bounds of the uncertainties are difficult to obtain in advance, adaptive laws are introduced to estimate the values of the uncertainties in real-time. Eventually, the numerical simulation results given to show the proposed controller can ensure the steady flight of missiles.     

A Study on the Estimation of Aeroheating upon the Warhead Nose at Supersonic Speed

An expression for estimating the aeroheating on a warhead nose at different supersonic speeds is proposed by incorporating CFD （computational fluid dynamics） and the least-square method. Compared with the traditional estimation formula, the expression is more accurate, convenient and can be used in the optimized design of warheads. The error from the result obtained in the test of a ball cartridge flight is less than 3 %. It satisfies the engineering requirements.